Solid-state sintering method was used to prepare ceramic materials based on bismuth ferrite, i.e., (BiFeO3)1 - x -(BaTiO3) and Bi1 Nd FeO3 solid solutions the Aurivillius Bi5Ti3FeO15 compound. The structure of examined using X-ray diffraction, Rietveld applied phase analysis refinement. Magnetoelectric coupling registered in all dynamic lock-in technique. highest value magnetoelectric coefficient α ME obtained for compound (α ~ 10 mVcm(-1) Oe(-1)). In case solutions, maximum is order 1 2.7...

Structural and physical properties of the high-entropy alloy ${(\mathrm{NbTa})}_{0.67}{(\mathrm{MoHfW})}_{0.33}$ were studied by x-ray powder diffraction, energy dispersive spectroscopy, magnetization, electrical resistivity, specific heat measurements. The experimental results supported theoretical calculations using two complementary approaches for electronic structure calculations: Korringa-Kohn-Rostoker method with coherent potential approximation (KKR-CPA) projector augmented wave (PAW)...

Th-containing superconducting high entropy system with the nominal composition (NbTa)[Formula: see text](MoWTh)[Formula: text] was synthesized. Its structural and physical properties were investigated by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, specific heat, resistivity magnetic measurements. Two main phases of alloy observed: major bcc structure minor fcc. The experimental results supported numerical simulation DFT Korringa-Kohn-Rostoker method...

Bi5Ti3FeO15 ceramics belongs to multiferroic class of materials.In this work it was prepared by solidstate sintering method and investigated X-ray diraction, Mössbauer spectroscopy, magnetoelectric effect measurements.As proved diraction studies the single-phase compound obtained.The investigations revealed paramagnetic character at room temperature as well 80 K. Magnetoelectric measurements were carried out using lock-in dynamic they presence coupling in material.Additional after subsequent...

Composites involving Fe and mesoporous silica SBA-15 were obtained by means of a novel method. Anhydrous FeCl3 was deposited on from gaseous phase at 220–250 °C then the adsorbed chloride hydrolyzed. Iron oxychloride which occurs in composites surprisingly stable against further hydrolysis, chlorine could only be completely removed after long multi-step treatment with water. We hypothesize that similar problem might have occurred course preparation other metal-modified silicas (also wet...

Abstract In this work, BiFeO 3 powders were synthesized by a sol–gel method. The influence of annealing temperature on the structure and magnetic properties samples has been discussed. X-ray diffraction studies showed that purest phase was formed in range 400 °C to 550 annealed at below nanocrystalline character. Mössbauer spectroscopy magnetization measurements used as complementary methods investigate state samples. particular, appearance weak ferromagnetic properties, significant growth...

Abstract The simple co-precipitation method was used to prepare Ag x FeO 2 delafossite with non-stoichiometric silver concentration in the range of = 0.05-1. obtained material investigated using X-ray powder diffraction and 57 Fe Mössbauer spectroscopy at room temperature. structural hyperfi ne interaction parameters were recognized relation decreasing concentration. study revealed that structure maintained up 0.9; as decreased 0.05 ≤ 0.8, a mixture AgFeO , O 3 or/and FeOOH formed.

Lead-boron special glass was doped into Ba0.996La0.004Ti0.999O3 (BLT4) ceramics in order to control the sintering process and grain growth, consequently obtaining materials with a well-developed microstructure. Changes microstructure resulted significant decrease electrical permittivity along substantial increase its frequency dispersion. Glass-doped ceramics, similar pure BLT4, are characterized by first-order phase transition from ferroelectric paraelectric phase. The temperature of this...

Ba0.75Ca0.25TiO3 ceramics were successfully synthesized by a simple solid-state reaction method. This study examined the influence of sintering temperature on structure, microstructure, dielectric properties and electrical behavior material. The XRD analysis reveals that tetragonal phase (P4mm) is dominant in all materials, with those sintered at T = 1400 °C 1450 being single-phase, while others exhibit minor orthorhombic (Pbnm). Higher temperatures promoted better grain boundary formation...

Abstract Three different methods were used to obtain Bi 5 Ti 3 FeO 15 ceramics, i.e. solid-state sintering, mechanical activation (MA) with subsequent thermal treatment, and electrical discharge assisted milling (EDAMM). The structure magnetic properties of produced samples characterized using X-ray diffraction Mössbauer spectroscopy. purest ceramics was obtained by standard sintering method. Mechanical are attractive because the compound may be formed at lower temperature or without...

This paper presents a study of magnetoelectric (ME) properties the PZT/Terfenol-D composite with varying number layers. The consists piezoelectric and magnetostrictive phases that are mechanically coupled. purpose this setup is to gain control over electric polarization material via an external magnetic field. Unlike most similar composites, our samples utilize commercial patch instead pure PZT. At present, researchers face two main problems regarding materials: (i) effect observed far below...

Delafossite CuFeO2 belongs to multiferroic class of materials.In this work, copper ferrite was prepared by mechanical activation with subsequent thermal treatment.X-ray diffraction and Mössbauer spectroscopy were used as complementary methods study the structure hyperfine interactions material.As proved X-ray diffraction, compound obtained relatively low amount secondary phases like CuO CuFe2O4.The revealed paramagnetic character at room temperature.The purest delafossite pre-milled...

In this work, nanocrystalline powders of iron-doped zinc oxide ZnO (iron content 3, 5, and 10 at.%) were prepared utilizing co-precipitation method.X-ray diffraction, scanning electron microscopy, the Mössbauer spectroscopy used as complementary methods to investigate structure hyperfine interactions material.It was found that Fe dopant is incorporated into würtzite structure.As confirmed by energydispersive X-ray distribution in obtained samples homogeneous up 5 at.%.For at.% iron, spinel...

The Fe-doped BaTiO3 ceramics with various iron concentration were prepared by the conventional ceramic technology.Structure of samples was studied X-ray diffraction, scanning electron microscopy and energydispersive spectroscopy.Hyperfine interactions determined using Mössbauer spectroscopy.As confirmed structural investigations, obtained materials are good quality ceramics, homogeneous free oxides Fe dopant clustering.It found that ions incorporated into tetragonal lattice barium titanate,...

Mechanical alloying was used to prepare Co40Fe60, Co60Fe35Ni5, Co 40 Fe 45 Ni 15 , and 35 25 alloys from the elemental powders.As X-ray diffraction studies proved final products of milling were solid solutions with bcc or fcc lattice average grain size between 20 50 nm.After heating up 993 K, mixtures two lattices formed in case Co-Fe-Ni alloys.Thermal treatment did not influence type 60 alloy.The Mössbauer spectroscopy revealed hyperfine magnetic field distribution ranged 33 38 T for alloy...